src/gallium/drivers/softpipe/sp_state_so.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "sp_context.h"
  29 #include "sp_state.h"
  30 #include "sp_texture.h"
  31
  32 #include "util/format/u_format.h"
  33 #include "util/u_memory.h"
  34 #include "draw/draw_context.h"
  35 #include "pipebuffer/pb_buffer.h"
  36
  37 static struct pipe_stream_output_target *
  38 softpipe_create_so_target(struct pipe_context *pipe,
  39                           struct pipe_resource *buffer,
  40                           unsigned buffer_offset,
  41                           unsigned buffer_size)
  42 {
  43    struct draw_so_target *t;
  44
  45    t = CALLOC_STRUCT(draw_so_target);
  46    t->target.context = pipe;
  47    t->target.reference.count = 1;
  48    pipe_resource_reference(&t->target.buffer, buffer);
  49    t->target.buffer_offset = buffer_offset;
  50    t->target.buffer_size = buffer_size;
  51    return &t->target;
  52 }
  53
  54 static void
  55 softpipe_so_target_destroy(struct pipe_context *pipe,
  56                            struct pipe_stream_output_target *target)
  57 {
  58    pipe_resource_reference(&target->buffer, NULL);
  59    FREE(target);
  60 }
  61
  62 static void
  63 softpipe_set_so_targets(struct pipe_context *pipe,
  64                         unsigned num_targets,
  65                         struct pipe_stream_output_target **targets,
  66                         const unsigned *offsets)
  67 {
  68    struct softpipe_context *softpipe = softpipe_context(pipe);
  69    unsigned i;
  70
  71    for (i = 0; i < num_targets; i++) {
  72       pipe_so_target_reference((struct pipe_stream_output_target **)&softpipe->so_targets[i], targets[i]);
  73
  74       if (targets[i]) {
  75          void *buf = softpipe_resource(targets[i]->buffer)->data;
  76          softpipe->so_targets[i]->mapping = buf;
  77       }
  78    }
  79
  80    for (; i < softpipe->num_so_targets; i++) {
  81       pipe_so_target_reference((struct pipe_stream_output_target **)&softpipe->so_targets[i], NULL);
  82    }
  83
  84    softpipe->num_so_targets = num_targets;
  85
  86    draw_set_mapped_so_targets(softpipe->draw, softpipe->num_so_targets,
  87                               softpipe->so_targets);
  88 }
  89
  90 void
  91 softpipe_init_streamout_funcs(struct pipe_context *pipe)
  92 {
  93    pipe->create_stream_output_target = softpipe_create_so_target;
  94    pipe->stream_output_target_destroy = softpipe_so_target_destroy;
  95    pipe->set_stream_output_targets = softpipe_set_so_targets;
  96 }